Subject: Re: multiple Tx queues
To: David Young <>
From: Sam Leffler <>
List: tech-net
Date: 01/07/2004 22:29:04
On Tuesday 06 January 2004 10:48 pm, David Young wrote:
> I am writing a driver for a curious 802.11 chip which has high-, medium-,
> and low-priority transmit queues. I think that ath has additional Tx
> queues, also.
> Also, atw has a Tx queue for traffic that needs "contention-free"
> service. There are rare and expensive APs which provide this service.
> They reserve a period of time between each beacon where stations have to
> shut up until the AP polls them. Packets needing a time-bounded service,
> like VoIP, are usually sent in that period.
> Any ideas how NetBSD can exploit these features?

You need to support, at least, the .1q TOS tag and VLAN tags.  When the h/w 
supports multiple queues you just want this stuff passed intact to the